Fishing tool



V. MONROE July 29, 1930.'

FISHING TOOL` Filed Aug. 6. 1926 2 Sheets-Sheet l FI 5.2M.l

, FIELI- WT/VESSES July 29,'1930.

v. MQNROEl i 1,771,808

FISHING TOOL Filed Aug. 6, 192e 2 sheets-sheet 2' Ill? Swxmhw W/T/VEGES awww Patented July 29, 1930 UNITED sT-Arss VERNE MONROE, OF CAMERON, WEST VRGINIA FISHING Toor.

Application sled Auguste, 192e. .serial No. 127,553.

This inventionY relates to tools Yfor use in connectlon With oil, gas or Ysimilar Wells and more particularly to an improved form ofl Working -head forsu'ch tools. Y

An object of this invention is to provide a Well tool Working head capable of being used With diiferent types of tool elements such, forY example, as spuds, rope grabs, rasps, etc., and hence to provide a single Working head having a Wider range'v of use than has heretofore been' possible. n

A further object is to 4provide a devicey of the type set forth Which is of simple, rugged construction, easy to manufacture and assemble and reliable and durable in operation.

These andY other objectsvvhichk Will be apparent to those skilled in this particular art are accomplished by means of theinventionl illustrated in the accompanying drawings, 2o vvhereinFigure 1 is a vieW infelevation of a` Well tool constructed in accordance with one form of this invention. Fig. -2 is a central sectional vieW of the operating-head illus! trated'in Fig. 1, showing certain tool elements i in expandedposition. v Fig. 3 is a view similar to Fig. 2, showing the tool elements in contracted relation. Figs. t and 5 are transverse sectional views on the lines l`4t and 5 5, respectively," of Fig. 2@ Fig. 6 is a 3o view in elevation of the Working head and 'Figs 7 and 8 are Vsimilar vievv's of one form of tool element adapted to be used in ,connection With the Workinghead.

Thel particular embodiment of this invention which has been chosen for the purposes of illustration includes a `'generally cylindrical tool head having longitudinally eitend ing grooves for receiving'the Shanks of tool elements such, for example, as the illustrated rope grabs;j

The upper portion ofthe tool'lea'd is provided Yvvithan annular recess for receiving the. heads of the various elementsv and the engaging surfaces of the tool head .and the tool elements are so formed that relative lontion they Will be contracted. It Will, ofv di course, be understood by those skilled inthe art that With certain tool elements the eX-' panded position will be the operative 'posti tion, While with other elements the contracted position is the operative position. 'Means are provided fornormally and yield'ablypre-Y venting movement of the tool elements When this is desirable as, for instance,'vv hen lowering the tool into a Well. s

As illustrated, the invention includesV a y tool head 5 of substantially cylindrical form having longitudinally extending grooves :6 spaced 'circumferentially therearound. The Shanks 7 of toolelements such, for example, 55 as 'the rope grabs v8 areI slidably received Within the grooves 6. andthe operating por tions of the various elements extend `dovvnvvardly below the Working head. Relatively7 rugged T-heads 9 are received vvithinrran an'- 70 nular circumferential head rreceiving recess 10 4formed in the cylindrical member above .the'shank receiving grooves 6 and the head i receiving recess -is of such size comparedto g the heads themselvesthatthe tool `elements '7 are slidable longitudinally of 'the tool yor Working head 5. '4

' The depth of eachv groove 6 is greater than the thickness ofthe tool Shanks 7 seeF ig. 2,

and the, circular bottom 11 of the annular re- 80 V15 of the grooves6 so as to produce aroclringV motion ofthe toolr elements upon longitudinal 90 movement thereof relatively to the tool head 5. This is accentuated by the fact that the bottoms 6 of the groovesv are inclined at an angle to the conical bottom 11 ofthe head receiving recess and the surface of the groove; bottomsv is extended into the recess 10, see Figs. 2,3 and 6.

The bottom of the Working head 5 is provided vWith an axiallyextending plug 16 which may conveniently form a bearing surface for the tool elements when in their lower contracted position and the elements are provided with notches 17 for engaging the surface of the plug 22 when so positioned. In this way the wickers are supported when in 'their contracted rope gripping position. The lower end of the plug 16 is provided with a threaded opening 18 which provides a joint connection by means of which auxiliary tools such, for example, as sinkers or rope knivesl may be secured and operated.

Means are provided for normally and yieldably holding such tool elements, for example, as the rope gripping wickers illustrated, in their inoperative position when the tool is being lowered into a well. As illustrated, this mechanism consists of openings 19 in the bottom of the grooves 6 adapted to .be laligned with openings 2O formed in the Shanks 7 of the tool elements for the purpose of receiving a brealiable pin 21 which, when inserted in the aligned openings, will support the wickers 8 in their expanded and nongripping position. Y

The tool head is provided with a cylindrical shell 22 which encloses the head and is held in position on an annular flange 23 by a spring pressed detent 24e which extends through a perforation25 formed in the shell. The shell is also provided with holes 26 in line with the pin openings 19 through which the wicker holding pins may be inserted.

In operation, assuming the rope grabs 8 to be yieldably held in their expanded position-by suitable breakable pins 21, as illustrated in Fig. 1, the tool will be lowered into the hole/until the wiclers have been positioned around the lost rope or cable. When the tool is raised the rope or cable will engage the points of the Wichers and resist the upward movement thereof. Such resistance is suiiicient to cause the wicker holding pins 21 to be sheared so that the tool elements will move downwardly relatively to the head 5. Such movement, as hereinabove described, causes the wiclrers to be moved inwardly toward each other and to obtain such a bite upon the lost rope that the points 2'? will not pull through the outer strands thereof.

Although I have described what now appears to be a preferred arrangement it will be understood that various changes, additions, omissions and substitutions can be made therein without departing from the spirit of the invention or the scope of the appended claims. Vhat I claim as new and desire to secure by Letters Patent is:

1. The combination in a device of the type described of a tool head, provided with circumferentiallj,7 spaced longitudinally Yextending grooves, a circular recess above said grooves, tool elements having Shanks and T-heads slidably mounted in said grooves and recesses respectively, the engaging surfaces of said elements and tool head being formed vprovided with a conical bottom inclined in a direction opposite to the bottoms of said grooves, tool elements provided with shanlrs slidably received in said grooves and T-heads received in said'recess, relatively abruptly in` clined surfaces on said Shanks adapted to spread the extending portions of said tool elements when moved in one direct-ion relatively to said head and to contract said elements upon movement in the other direction, and holes in said shanls and the walls of said grooves adapted to be alined so as to receive a brealrable pin for holding said elements in a predetermined position. i

3. The combination ina device ofthe character described of a tool head having a circular recess formed therein, circumferentially spaced longitudinal grooves below said recess and tool elements slidably mounted in said recess and grooves, the surfaces of said tool elements being adapted to engage the bottom ofsaid recess and grooves and being so formed that on longitudinal movement thereof inrone direction relativeto said tool head, the elements are contracted and on movement thereof in the opposite direction' the tool elements are expanded. Y

4. The combination in a device of the type described of a tool head having a circular recess formed therein, ycircumferentially spaced grooves below 'said recess, tool elements provided with T-headed shanls slidably'mounted in said recess and said grooves, a shell surrounding said tool head for holding said tool elements in positionV thereon, and means for fastening said shell to said tool head.

5. The combination in a device of the type described of a tool'head having a` circular recess provided with a conical bottom formed therein, circumferentially spacedflongitudinal grooves having bottoms inclined in the opposite direction to-the bottom :of saidrecess, and tool velements having T-headed shanlrs slidably mounted in said recess and grooves, each of said shanlrs having a shoulder thereon adapted to engage the inclined bottom Vof said grooves when said'tool elements are in their uppermost position in said tool head for expanding said tool elements, and means for holding said tool elements in the expanded position.V i

6. The combination in a device of the type described of a substantially cylindrical tool head provided With circumferentially spaced longitudinally extending grooves having bottoms inclined With respect to the axis of said head, a circular recess above said grooves provided With a conical bottom inclined in a direction opposite to the bottoms of said grooves, tool elements provided WithT-headed Shanks slidably mounted in said grooves and recess, a shoulder on the lower portion of each of said shanks adapted to engage the bottom of said grooves When said tool elements are in their uppermost position in said tool head for expanding said tool elements,

a shell surrounding lsaid tool head for securing the ltool elements thereinmeans for removably fastening the shell to said head, and holes in the said shell, Shanks andthe bottoms of said grooves adapted to be aligned so as to receive a breakable pin for holding said tool elementsin the expanded position.

In testimony whereof, I have hereunto sub scribed my name this 3rd day of August, 1926. VERNE MONROE.

so j 

